It’s Not the Roof, It’s How It’s Attached

You have several choices when choosing a roof covering for your home. Most homes in the U.S. have asphalt shingles for roof coverings. Other choices include clay or concrete tile, metal panels, and slate. But which performs better during a hurricane? The answer may surprise you. All of these types of roof coverings can perform well if they are attached properly.
Whatever roof covering you choose to install, always follow the manufacturer’s recommendations as a minimum
requirement. Also remember that fasteners should be long enough to penetrate the sheathing (plywood) or penetrate 3/4-inch into wood or plank decks.
Recommended Installation For:
Shingles
– Hand nailing is best for accuracy and 6 nails per shingle are preferred especially in high wind areas. It is also wise to apply a dab of roof cement under each tab.
Clay or concrete tile – Nose, butt, or side clips should be used in high wind or seismic areas. These are commonly
referred to as wind clips or storm anchors. Two screws per tile give the highest wind uplift resistance and will help the tile resist shifting.
Metal panels – Clips or cleats are preferred over exposed fasteners because they aren’t exposed to weather. They also allow the metal to expand and contract reducing the opportunity for it to buckle. Fasteners should be corrosion resistant and penetrate the sheathing.
Slate – Slate should be attached with flat head copper-wire slating nails. In high wind areas a dab of roof cement or polyurethane sealant should be applied under the exposed part and the slate then installed using 4 nails per slate.
It’s Hip to Be Hipped
Did you know that the shape of your roof can have a lot to do with how it stands up against high winds? Hipped roof systems are more likely to stay put in a hurricane than gabled roof systems. Why? Unlike gabled roofs, a hipped roof slopes upward from all sides of the building. The aerodynamic properties and construction techniques inherent in hipped roofs help them perform better in windstorms than gabled roofs. A gabled roof has two slopes that come together to form a ridge or a peak at the top – each end looks like the letter “A.” Homes with gabled roofs are more likely to suffer greater damage, such as collapse of the end wall from high winds because they are often not braced properly during construction.

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